[Galaxy S3 Neo Q&A, Help & Troubleshooting] TheForgotten:
After a lot of search, I've found the solution for all the problems that you can have with your Galaxy S3 Neo's cam.

Try all these steps. If none of them worked I'm very sorry, but I can't help you.

Step 1: Clean the Camera app cache and data.

1. Go to Settings.

2. Go to General.

3. Enter in Application Manager.

4. Go to all tab, search for "Camera" and tap on it.

5. Once you're at app info, clear data and cache..

If that didn't work then try the next step.

Step 2: Clean the gallery app cache and data.

Don't worry, this won't delete any of your pictures :)

1. Go to Settings.

2. Go to General.

3. Enter in Application Manager.

4. Go to all tab, search for "Gallery" and tap on it.

5. Once you're at app info, clean data and cache.

If that didn't work then try the next step.

Step 3: Wipe cache partition.

1. Shutdown your phone.

2. Enter in recovery mode/menu or whatever. To do this, you need to press Volume Up+Home Button+Power Button. Once you see Samsung Galaxy SIII Neo in the screen you can let them go.

3. Use the volume buttons to move the highlight to the option "Wipe cache partition" and the power button to select it. Once you've done that, select the "Reboot system now" option.

If that didn't work then try the next step.

Step 4: Do a factory reset.

1. Enter in recovery mode/menu again. To do this follow the first 2 points of the step above.

2. Once you're there, move the highlight to the option "wipe data/factory reset" and select it. This will delete all of your data, so make sure to do a backup before!!

3. Once it is done, move the highlight to "Reboot system now" and select it.

If that didn't work then try the next step.

Step 5: Flash another ROM.

If any of the steps above didn't work for you, probably you have the wrong ROM installed. This happened to some phones because Samsung released Galaxy S3 Neo with 2 types of cameras: one with a Sony camera and one with what I think that's a Samsung camera, but I'm not sure.

To know the correct ROM for you, you need to know what

Camera

do you have.

To do this, follow the following steps:

1. Go to Play Store and download a app called AIDA64.

2. After you did that, open the app.

3. Once you're in the app, go to the "Devices" tab and search for the "Camera ID" string.

4. If it starts with "SLSI_s5k4", you need to download a ROM from here for your S3 Neo model that has "NI" and "NJ" in the PDA and/or CSC. If your country doesn't have any ROM with that specifications, download another from a neighbor country.

If it starts with "SONY_IMX", you need to download a ROM from here for your S3 Neo model that doesn't have "NI" and "NJ" in the PDA and/or CSC. If your country doesn't have any ROM with that specifications, download another from a neighbor country.

After you download the ROM, you'll need to flash it. To do this you need to download a software called "Odin". I used the v1.83 and it worked very well for me. You can download it from here.

You'll need the USB drivers as well. Download them from here. After you installed them, follow to the next points:

1. Shutdown your phone.

2. Enter in download mode. To do this, press Volume Down+Home Button+Power Button.

3. When you see a "Warning!!" screen, you can let the buttons go. After that, press Volume Up.

4. Now you're at download mode.

5. Now open Odin on your computer.

6. Once it's open, connect your phone to your computer using a USB cable.

7. Let Odin recognize it. To know if already recognized, you should see a yellow rectangule that has something like "0:[COM3]". It doesn't need to be exactly the same thing.

8. Now click on PDA and select the file that you extracted from the file that you downloaded.

9. Make sure only "Auto Reboot" and "F. Reset Time" are marked.

10. Click on start and wait.

11. When the process ended, your phone should reboot. Don't touch the phone or unplug the cable until you see the lock screen!!

Hoped I helped you :good:

If your phone started to bug/glitch a bit after you flashed the ROM, just do a factory reset and you should be fine (follow Step 4) :D

I just tested this in a GT-I9301I from Portugal, and this worked for me :victory:

I'm not responsible if something go wrong. Do this at your own risk!!